My brother and I both have yj's and our Dad bought a new '12 JKU off the showroom floor in 2011. He's put on about 15k miles and has gone wheeling with us a few times. He's starting to really get into it so he wanted to make his Jeep capable of the fun stuff (blue/mild black trails), without risking too much damage.

It took about 2 weeks to get most of the parts in:

Then my brother and I were set to install everything in 1 day. It ended up taking us 13 hours non-stop.